Where the Power Is: Data Center Site Selection in 2026

Power availability has overtaken connectivity as the primary driver of data center location decisions. Here is how the map is changing.

For twenty years, the mantra of data center site selection was simple: proximity to fiber. The Ashburn, Virginia "Data Center Alley" phenomenon — where over 70% of the world's internet traffic flows through a single Loudoun County corridor — was built on fiber connectivity, not power. But in 2026, the calculus has fundamentally shifted.

Power availability — specifically, access to 100+ MW of firm, reliable electricity with a short interconnection timeline — has become the dominant factor in site selection. Fiber can be built in months. A transmission interconnection can take years. The winning markets are those where power is available now, not where fiber was laid decades ago.

The New Site Selection Hierarchy

The criteria that drive data center site decisions have been reordered:

1. Power availability and timeline: Can the utility deliver 100+ MW within 2–3 years? If not, the site is eliminated regardless of other attributes.
2. Interconnection queue status: Is there existing transmission capacity, or does the site require a new interconnection study (3–7 years)? Sites with existing, unused transmission capacity command a premium.
3. Energy cost and structure: The all-in delivered cost of electricity, plus the availability of favorable tariff structures (see our analysis of utility data center tariffs).
4. Fiber connectivity: Still important, but secondary. Dark fiber can be built from the nearest fiber backbone in 6–12 months at modest cost.
5. Workforce and real estate: Labor availability, land cost, tax incentives, and permitting timelines.
6. Climate and water: Cooling efficiency potential, flood risk, and water availability (see water consumption analysis).
7. Regulatory environment: Permitting speed, environmental review requirements, and political support for data center development.

Winners: Markets with Available Power

Several markets have emerged as winners in the power-driven site selection landscape:

Northern Virginia (Still the King — But Strained)

Loudoun and Prince William counties remain the largest data center market in the world, with over 3 GW of existing capacity. Dominion Energy, the local utility, has secured regulatory approval for a massive transmission buildout to support continued growth. However, interconnection timelines have stretched to 4–6 years for large new loads, and Dominion's tariff structure for data centers is being contested (see our utility tariff analysis).

Power availability estimate: 3+ GW existing, 1–2 GW in development pipeline. New 100 MW+ sites face 4–6 year interconnection.

Dallas/Fort Worth, Texas

North Texas has become the fastest-growing data center market in the US, driven by ERCOT's competitive wholesale market, abundant renewable generation, and Oncor's relatively efficient interconnection process. The Dallas-Fort Worth metroplex now hosts approximately 1.5 GW of data center capacity, with another 2 GW in development.

Power availability estimate: 1.5 GW existing, 2+ GW in development. Oncor interconnection: 2–3 years for typical projects.

Phoenix, Arizona

Salt River Project (SRP) and Arizona Public Service (APS) have been proactive in accommodating data center load. Phoenix offers low land costs, favorable tax treatment, and a growing fiber ecosystem. The constraint is water, not power — as discussed in our water consumption analysis.

Power availability estimate: ~1 GW existing, 1.5 GW in development. Interconnection: 2–4 years.

Ohio and Indiana (The Midwest Rising)

The Midwest is experiencing a data center renaissance, driven by PJM's massive transmission grid, low electricity prices ($0.04–$0.06/kWh), and available land. Amazon, Google, and Microsoft have all announced major campuses in Ohio. Indiana has attracted several large-scale projects, including a 1,200 MW campus near New Carlisle.

Power availability estimate: ~2 GW existing across OH/IN, 3+ GW in development. PJM interconnection: 3–5 years (improving with cluster study reforms).

Emerging Frontiers

Beyond the established markets, several emerging frontiers are attracting data center developers who need scale and are willing to accept less developed ecosystems:

• West Texas / Permian Basin: Abundant wind and solar generation, stranded natural gas, available land, and low population density. The constraints are fiber connectivity and workforce. Projects like the Texas AI Corridor (800 MW) are pushing into this frontier.
• New Mexico: Growing interest from data center developers attracted by cheap land, available transmission capacity, and a supportive state government. PNM (the largest utility) has capacity on its system.
• Georgia and the Southeast: Georgia Power has been proactive in accommodating data center load. Metro Atlanta hosts a growing cluster, and rural sites are being evaluated for larger campuses.
• Nevada (outside Las Vegas): Rural Nevada offers inexpensive land and access to renewable energy, but water constraints and transmission distance to load centers are challenges.

The "Behind-the-Meter" Sites

A growing category of sites bypasses grid interconnection entirely by co-locating with generation. These include:

• Nuclear co-location (existing nuclear plants — see nuclear analysis)
• Natural gas co-location (the Ohio River Energy Park model)
• Hydropower co-location (the standard in the Pacific Northwest, now being replicated globally)
• Geothermal co-location (early-stage but promising in the Great Basin and Western US)

These sites offer the holy grail — firm, dedicated power without grid interconnection delays — but require the data center operator to become an energy developer, adding complexity and risk.

What This Means for Developers

For data center developers planning 2027–2030 capacity, the site selection process must start earlier and look broader than ever. Our market intelligence tracks power availability, interconnection timelines, and tariff structures across 30+ US markets. The key recommendations:

• Start power procurement 3–5 years before the planned energization date
• Evaluate multiple markets simultaneously; power availability can change rapidly as utilities take on new load
• Consider behind-the-meter generation as a hedge against grid delays
• Factor water constraints equally with power constraints in arid markets
• Monitor utility tariff changes — favorable tariffs can be eliminated or restructured

Key Takeaways

• Power availability has overtaken fiber connectivity as the #1 site selection factor
• Northern Virginia leads but faces 4–6 year interconnection timelines
• Dallas/Fort Worth is the fastest-growing market with 2+ year interconnection
• The Midwest (Ohio, Indiana) is rising with low prices and available capacity
• Emerging frontiers include West Texas, New Mexico, and the Southeast
• Behind-the-meter generation sites bypass grid interconnection entirely